06.04.2014 - Measurements of Salivary Alpha Amylase and Salivary Cortisol in Hominoid Primates Reveal…

Author: Behringer, V, et al. (2013) PLoS ONE

Salivary alpha amylase (sAA) is the most abundant enzyme in saliva. In this study, the researchers explored patterns of variation in sAA activity in bonobos and three other hominoid primates, chimpanzee, gorilla, and orangutan to (a) examine if within-species differences in sAA activity found in bonobos are characteristic for hominoids and (b) assess the extent of variation in sAA activity between different species. The results revealed that gorillas and orangutans had low salivary cortisol concentrations and the highest cortisol concentration was found in samples from male bonobos, the group that also showed the highest sAA activity.